81080001887841 has 16 divisors (see below), whose sum is σ = 131038386889920. Its totient is φ = 49139395083360.

The previous prime is 81080001887831. The next prime is 81080001887849. The reversal of 81080001887841 is 14878810008018.

It is not a de Polignac number, because 81080001887841 - 2⁷ = 81080001887713 is a prime.

It is a super-2 number, since 2×81080001887841² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81080001887849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136498319380 + ... + 136498319973.

It is an arithmetic number, because the mean of its divisors is an integer number (8189899180620).

Almost surely, 2^{81080001887841} is an apocalyptic number.

It is an amenable number.

81080001887841 is a deficient number, since it is larger than the sum of its proper divisors (49958385002079).

81080001887841 is a wasteful number, since it uses less digits than its factorization.

81080001887841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272996639373 (or 272996639367 counting only the distinct ones).

The product of its (nonzero) digits is 917504, while the sum is 54.

The spelling of 81080001887841 in words is "eighty-one trillion, eighty billion, one million, eight hundred eighty-seven thousand, eight hundred forty-one".